If you read enough RV forums you will see that quality control is lacking in all. Regardless of price.
You will also see that most are made with "off the shelf products".
So where does the "cheap" come in.
I have never believed that high $$$ necessarily buys quality.
Take your time and look at various models after doing your homework.
Look at what quality control should have caught.
Fit, finish, gaps and material weight. Thin siding or dense.
Some people will say heaver is better. I disagree as particle board is heaver than plywood but not as strong. Ask for documentation on materials used.
Use all your senses of sight, feel, hearing, smell to give you clues.
Search for recall on the web. That will give you an idea. Look at various "owner forums". Their conversation will give you a lot of information.
DO not rush.
Good luck.